Activity for rherma
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #287027 |
Post edited: |
— | almost 4 years ago |
| Edit | Post #287027 |
Post edited: |
— | almost 4 years ago |
| Comment | Post #287029 |
I understand the concept of a ground loop - but I don't understand why it creates a DC offset.
The impedance of the measurement glass combined with the parasitic capacitance creates a low pass filter, bandwidth of around 5Hz. So most 60Hz noise should be attenuated passively.
The refere... (more) |
— | almost 4 years ago |
| Comment | Post #287027 |
MicroSiemens - https://en.wikipedia.org/wiki/Siemens_(unit)
Commonly used unit when measuring solution conductivity (by way of a conductivity cell).
(more) |
— | almost 4 years ago |
| Edit | Post #287027 | Initial revision | — | about 4 years ago |
| Question | — |
pH Electrode Buffer - Offset when solution grounded Problem pH electrode buffer offset appears when solution is grounded. Detail I have a pH electrode in some conductive solution (1000uS). The output (measurement electrode) is buffered by an electrometer type opamp. The opamp rails are powered by an LDO (+/- 3.3V) which in turn are... (more) |
— | about 4 years ago |